没什么用，只是列出了函数的名字，并没有例子。例如：Purpose: Computes the arc cosine. Syntax: float acosf(float x); double acos(double x); long double acosl(long double x); Declared in: Description: The function computes the angle whose cosine is x, in the interval [0, pi] radians. The argument x
没什么用，只是列出了函数的名字，并没有例子。例如：Purpose: Computes the arc cosine. Syntax: float acosf(float x); double acos(double x); long double acosl(long double x); Declared in: Description: The function computes the angle whose cosine is x, in the interval [0, pi] radians. The argument x
很好！！！准确！！！